The 68030 in a falcon has no way of accessing any memory at 32 bit. In the Atari world ST-RAM is equivalent to 16 bit chip ram and TT-RAM is 32 bit fast ram, the falcon (without an accelerator) only supports ST-RAM.
no.
at least, strictly speaking:
in Atari world how many bits RAM have does not determine it's name. Name is determinate if RAM is accessible by custom chips.
ST-RAM is ram that is accessible by custom chips (video, audio) and
TT-RAM is accessible only by CPU and not by custom chips
TT-RAM usually is 32bit but e.g. on Atari ST you can have TT-RAM (if you have more than 4MB) but it will be accessed also in 16bit and will be not accessible by custom chips (I think that it is same on e.g. Amiga 500/600: FastRAM would be no faster than ChipRAM coz it will be also 16bit and will be no accessible by custom chips).
So to get good performance you have to pay just as much for as an accelerator as you do on the A1200. Which makes the choice of 68030 rather strange. It's obviously a 68000 design with a 68030 shoe horned in as they only connect 24 address lines. The A1200 on the other hand can get 32 bit fast ram with just a cheap trapdoor ram upgrade. Although the A1200 is limited to 24 address lines unless you buy an accelerator.
memory read/write speed of stock Atari Falcon is faster than stock Amiga 1200:
Falcon ST-Ram R/W 32bits (MB/s): 5.345 / 6.488 (nembench)
Amiga ChipRam R/W 32bits (MB/s): 3.020 / 5.330 (
SysSpeed)
Amiga access ChipRAM RAM in 32bit at ~7MHz and Falcon access ST-RAM in 16bit at 16MHz. Videl (video chip) access ST-RAM in 32bits burst mode. ChipRAM in Amiga 1200 is 250ns and in Falcon 120ns.
BUT on Amiga you could easily (and cheaply!) add FastRAM and outperformance Falcon in memory performances (with FastRAM A1200 should be two times faster?)!
Which makes the choice of 68030 rather strange.
Reason for 68030 is probably MMU so MiNT (MultiTOS) could use memory protection.
and btw MMU in Falcon made X68000
emulator possible

Cho Ren Sha -
https://www.youtube.com/watch?v=voiRnr72YhQPac-Mania -
https://www.youtube.com/watch?v=HELyQzBSB9MGalaga 88 -
https://www.youtube.com/watch?v=kOH_uMRSrDYand in future maybe NeoGeo if Anima summon some dark magic
https://www.youtube.com/watch?v=hxPCYeHtg60